Machine foe



UNITED sTATEs PATENT oEEIcE.

ALANsoN CARY, or woRcEsTER,`MASSACHUSETTS.

MACHINE FOR DRESSING IRREGULAR FORMS.

Specification of Letters Patent No. 7,750, dated November 5, 1850.

To all whom t may concern Be it known that I, ALANsoN CARY, oflVorcester, in the county of lVorcester and State of Massachusetts, haveinvented certain new and useful Improvements in Machinery for CuttingIrregular Forms in Ivory, Wood, or other Materials; and I do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawing, forming partof this specification, in which- Figure l, is a front elevation. Fig.2', is a plan or to view. Fig. 3, is a transverse vertical sectionthrough the center of the table and bench. Fig. 4, is a horizontalsection through the bottom slide of the work table. Fig. 5, is aperspective view showing the underside of the dog which locks the slideD.

Similar letters of reference indicate correspending parts in each of theseveral figures.

The nature of my invention consists ina horizontal bench, in or near thecenter of which is a circular table which is fitted in such a manner tothe bench as to be capable of receiving a circular motion, the tablecarries two slides placed at right angles one above the other, the lowerone capable of sliding in a line across the circular table, and theupper one sliding in rabbets or guides in the lower one, at right anglesto the direction in which the lower one itself slides; the work to beoperated upon is secured by dogs to a plate above the top slide and bythe means hereinafter described receives such a motion that a fixedpoint will mark the required pattern on the work; a rotary cutter issuspended on a swinging arm above the work, this is capable of beingadjusted to take a cut of the required thickness, and while motion isgiven to the work in the required direction it will cut it to therequired form.

To enable others skilled in the art to make and use my invention I willproceed to describe fully its construction and operation.

A, A, (Figs. l, 2 and 3) represent the frame or* bench which supportsthe machinery. B, is the circular table which is fitted and secured tothe center of the bench in such a manner as to allow it `to receivecircular motion. C, is a metal slide which has two projections on itslower side fitting in rabbets (a) on the surface of the table B; it issecured to the table so that it can slide freely upon it. D, is a metalslide fitting in dovetail grooves in the slide C, at right angles to therabbets in the table B, it has twov toothed racks (d, cZ,) attached onenear each edge to its under side. E, is a plate secured to the top slideD, a space is left between D, and E, the plate E, car'- ries the workwhich is here represented (see F, Figs. l, 2, and 8,) as an ivory handlefor a table knife it is secured to the plate by an eccentric dog (b)which holds it firmly against studs (c, c). l

G, the form of which is shown by dotted lines in Fig. l, and which isalso seen on edge in Fig. l, and in section in Fig. 3) is a gage orpattern of the required form of the pattern which is to be cut upon thework, it is secured tothe slide D, under the plate E.

H, is the rotary cutter which is similar to some of the cutters employedin other machinery used for similar purposes, it is secured upon aspindle (I,) which works in a bearing at the end of an arm (J which ishung upon a fixed pivot orcenter K, secured to one end of the bench.- L,is a spring bearing on the arm J, f, is a pulley fast upon the spindleI.

M, is a short pillar secured to the top of the bench A, A. It carries ashort fixed arm (N). L, is a screw which is jointed by a pin to the endof the arm N, and is curved to the form of an arc described from thecenter of K. It passes through the arm J, and is provided with a nut(6,) upon which the arm J, rests, the spring L, always keeping' it closedown upon the said nut, which may be raised or lowered to suit thethickness of the work or of the required cut.

g, (seen in dotted lines in Fig. 2, and seen on edge in Fig. 3,) is apointer. It has a shank passing through the pillar M, and is secured bya set screw. It bears upon the upper surface of the slide D; when therotary cutter H, is in motion the gage or pattern G, being placed incontact with the end of the pointer, and its entire edge drawn past it,the material upon the plate E, will have a pattern cut upon it similarto G.

r, is a notched projection standing up above the table B.

s, is a dog attached to the slide D, having an angular projection m,(see Fig. 5,) fitting in th'e notch in fr, for the purpose of lockingthe slide while a circular pattern is being cut.

O, (best seen in Fig. 2) is an irregular way or groove which is securedto the top of the bench A, A.

P, is a pin passingthrough the plate E, and slide D, its lower end tseasily in the way O, which is of ysuch'form, that when the pin is movedalong it, it will cause the slides C, and D, and thetable B, totake suchmotions, as to cause the upper slide D, and v `plate E, to4 describe therequiredA pattern to be given to the material; the motions of the slidesat right angles to each other, and the circular motion of the tables',will allow of any formbeing given to the pattern.

R, .is a standard secured by screw bolts tothe under side of the slideC. S, is an uprightA shaftpassing through a socket in .the lower partofr the standard R, which serves as a guide; it also fits in a metal boXor bearing T, (see Figs. 3 and 4,) which slides in'rabbets in the lowerslide C, above the said box; it is provided with a toothed lwheel. whichmay be geared with either `ofthe racks d, el, von the upper slide D; the

lower endof the shaft carries aworin wheel (fv,) lin'which an endlessscrew (70,) upon a horizontalshaft V, gears; the shaft V hangs inbearings (Z, Z,)-one of which is suspend led vfrom the frame or bench A,A, and the other/from the shaft S. Itcarries a pul- 1ey(m) L n., (see F1s. 3 and 4,) isa bent lever wh ich works on a 'Xed stud (o) below theslide, one.

end is attached to the sliding boX or bearing T, and the other endprojects out from under thesildeC, and is provided with a knob or handlewhich may be moved so as to throw the wheel z', in gear with either ofthe racks d, (Z, or out of gear with both, in either of which positionsvit may be secured by a spring catch.

W, is the driving shaft, carrying the pul-y ley X, which receives themotion, the pulley Y, .which communicates it (through a band running onthe pulley (f) to the cutter shaft, and the pulley Z, which communicatesit by a band running on the pulley m,) to the shaft V. p

, The operation is as follows: The feed or` pin P, round the irregularway, or b moving the edge of the pattern or gage past the end of thepointer g; either of these devices for giving form to the material maybe employed separately or both-at the same time.

If it is intended to make the feed self acting, the wheel z', must bethrown into gear with either of the racks d, d, according to thedirection in vwhich it is desired to move the work, and rotary motionmust be given kto the` upright shaft S; in cutting patterns which arenot circular but straight or only vslightly curved the dog s, is thrownback rfrom lthe notch in the projection 1, onv the land the dog s, isbrought into the notch in the projection r, on the table B, whichprevents the slide D, from traveling farther forward and causes thewheel a, to give a circular motion to the table B, the pin P, at thistime-runs in a part of the way O, which is concentric with the center ofthe table B, (see Fig. 2;) the motion will require to be changed atvarious points on the pattern, this is effected by throwing the wheelz', into gear with the opposite-rack.

This machinery may be used for cutting various patterns on the handlesof table cutlery or other similar articles, as for instance a iutedpattern, and also for some forms of pistol-stocks, and for many otherpurposes.

The forms of the pattern or gage G, and way7 O, and also of the cuttermust be changed for cutting work of different patV terns; an irregularsurfacel may be cut on the top side of the material at the same time byusing gages to give a vibratory motion to the cutter arm J.

Having thus fully described my invention I ,will proceed to state what Iclaim as new and desire to secure by Letters Patent- I claim the toothedwheel z', upon the shaft S, arranged so that itis capable of beingthrown in gear with either of the racks (Ld, in combination with the dogs, ron the slide D, andthe notched projection on the table B by whichthe slide is locked to or unlocked from the table for the purpose ofenabling the wheel z', to give either a rectilinear, motion to the saidslide D, or a circular motion to the table B, as may be required, in themanner and for the purposes substantially as herein set forth.

ALANSONl CARY.

Vitnesses CHARLES O. DAvIs, PHILIP L. MoEN.

